Bash is a shell, or commend language interpreter, for the GNU operating system
Example. $USER and $PWD are variables
- echo “print” # to print something
val=1
val=$((val+1)) # it increases the value by 1
- We can use let val+=1 to increase its value
fix=2
for ((i = 1; i <= 99; i++))
do
if [ $((i%fix)) -eq 1 ]
then
echo "Number: $i"
fi
done
output: 1, 3, 5, 7, 9, 11, ....., 99
- read is used to take input
- Comparing numbers:
read X
read Y
if [ $X -lt $Y ] ;
then
echo "X is less than Y"
elif [ $X -gt $Y ] ;
then
echo "X is greater than Y"
else
echo "X is equal to Y"
fi
- Comparing multiple conditions:
read c
if [[ c=="Y" || c=="y" ]]
then
echo "YES"
else
echo "NO"
fi
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